The nosris peters co



(No Model.) 2 Sheets-Sheet 1.

L THORNTON.

PUMP.

NoI 428,238. Patented May 20, 1890.

(No Model.) 2 Sheets- Sheet 2.

I. THORNTON.

` PUMP.

'No. 428.238. Patented May v20, 1890,Y

UNITED STATES PATENT OFFICE.

ISAAC THORNTON, OF NEVADA, MISSOURI.

PUMP.

SPECIFICATION forming part of Letters Patent No. 428,238, dated May 20,1890.

Application filed March 22, 1889. Serial No.304,24l. (No model.)

To all whom t may concern,.-

Be it known that I, ISAAC THORNTON, a citizen of the United States,residing at Nevada, in the county of Vernon and State of Missouri, haveinvent-ed a new and useful lmprovement in Pumps, of which the followingis a specification.

This invention relates to pumps; andit consists in certain improvementsin the construction of the same, having for their object to prov-ide asimple, inexpensive, and useful device which may be easily operated.

The invention consists in the improved construction, arrangement, andcombination of parts, which will be hereinafter fully described, andpointed out in the claim.

In the drawings, Figure 1 is a side view of my improved pump. Fig. 2 isa vertical sectional view ot' the same. Fig. 3 is aside view, partly insection, illustrating a modification. Fig. et is a detail view of theplunger removed from the cylinder.

The same letters refer to the saine parts in all the figures.

A designates the pump-cylinder, which is provided at its lower end witha concave seat B for the ball-valve C, which is retained in position bymeans of a basket D, attached to the bottom of the cylinder. The upperend of the cylinder is provided with a cap or cover E, between which andthe upper end of the cylinder packing F is interposed, so as to make atight joint.

G and H are elliptical base and cap plates, the former of which isprovided with a concave seat for the lower end of the cylinder, and withan opening I, forming a water-passage. The base and cap plates areconnected by means ot' the bolts or rods J J, which are provided abovethe cap-plate with transverse slots K to receive the wedge-shaped keysL,-

by means of which the cap-plate is maintained securely in position, andis moreover forced down tightly against the cover of the cylinder',which is thereby retained securely in position and in such a manner asto form an air-tight joint. The rods J J are extended upwardly to thewell-curbing, as shown at M, where they are braced so as to retain thecylinder securely in the well below the water= level. Owing to the factof the connecting= tight joint between the plunger and the cover.

The packing is retainedin the annular recess of the ycover by means of acap-plate H, which, as 'above stated, is wedged down tightly against thehead of the cylinder. The lower end of the plunger is provided with thediverging arms Q Q, to which is attached the piston R, which is providedwith an annular groove S, in which is fitted a packing-ring T ofsuitable construction. It will be observed that this piston titssmoothly in the bore of the cylinder, the packing-ring serving to form aperfectly-tight joint. The upper side of the piston is provided with aconcave seat for a ball-valve U, which is retained in position by valvesof the diverging arms, by Which the pist-on is connected to the plunger,the spaces between the said arms forming the water-passages. From theupper end of the plungera tube B ext-ends upwardly to the top of theWell, where it is provided with a dischargespout, which, as shown inFig. l of the drawings, may be in the form a goose-neck W. WVhendesired, however, the discharge-spout X may be attached to the side ot'the tube below its upper end, which is closed, the space above thedischarge-tube serving to form an air-chamber, whereby a steady flow isinsured when the pump is in operation.

Y designates a standard attached to the well-curbing and having at itsupper end a lever, one end of which is pivotally connected with a collarZ, encircling the discharge-tube of the drum. It will be seen that byoperating this lever, the discharge-tube, and with itthe plunger, may bereciprocated vertically, so as to operate the pump.

The operation and advantages of this invention Will be readilyunderstood from the foregoing description, taken in connection IOO withthe annexed drawings. On the upstroke of the plunger the valve in thepiston remains closed, while the valve at the bottom of the cylinderopens for the admission of Water. On the downstroke the valve at thebottom of the cylinder is closed, when the pistonvalve opens, so as tocause the Water to pass into the cylinder above the piston. As the Waterrises in the cylinder it compresses the an' in the upper end of thelatter, and the airpressure serves to force the water up through theplunger and through the tubular discharge-pi pe. It will thus be seenthat by properly proportioning the capacity of the cylinder a steady andeven flow of water may be secured with small expenditure of power tooperate the pump.

Having thus described my invention, I claim and desire to secu re byLetters Patent- The combination, with the pump-cylinder, of thecap-plate tted loosely at its upper end and having a central openingprovided with an annular recess, the packing F, interposed between saidcap-plate and the upper edge of the cylinder, the vertically-movableplunger extending through the central openingin the cap-plate, thepacking P, arranged in the annular recess of said opening around theplunger, the top and bottom plates I'I G, the former having a centralopening for the passage of the plunger, the supporting and con-

